Engine-primer.



L. A. CASGRAINQ' ENGINE PRIMER.

APPLICATION men MAR. 8. mm.

1,21,291, Patented. 001;.15, 19m

LOUIS A. QASGRAIN, 0F BEVERLY, MASSACHUSETTS.

ENGINE-PRIMER.

Specification of Letters Patent.

Patented Oct. 15, 1918.

Application filed March 8, 1917. Serial No. 153,375.

To all whom it may concern:

Be it known that I, LOUIs A. CASGRAIN, a citizen of the United States,residing at Beverly, in the county of Essex and State of Massachusetts,have invented certain new and useful Improvements in Engine-Primers; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The present invention relates to priming devices for internal combustionmotors, and more particularly to priming devices of this characteradapted for attachment'to existing motors having the usual'form ofcarbureter.

It is desirable, especially in cold weather, to have some sort ofauxiliary device which may be actuated to inject a small quantity ofliquid fuel directly into the intake manifold between the carbureter andthe motor.

provide a single unitary apparatus which may be conveniently controlledby the operator for injecting either liquid fuel or air or both into theintake manifold when desired.

With these objects in view the several features of the invention consistin certain novel features of construction, combination and arrangementof parts hereinafter described and claimed, the advantages of which willbe obvious to those skilled in the art from the following description.

' In the accompanying drawings illustrating the preferred form of theinvention Figure 1 represents an elevation of the preferred primingdevice ready for attach ment; Fig. 2 is a longitudinal section inelevation of the device shown in Fig. 1; Fig.

3 is a detail showing a section of the valves and actuating devicescontrolling the flow of liquid and air into the intake manifold and Fig.4 is adetail showing the means for operating the valve.

In the illustrated embodiment of the invention the apparatus comprises afuel receptacle indicated at 5 having a discharge pipe 6 leading fromthe bottom and adapted to be connected in any suitable manner with theusual intake manifold of the motor. The apparatus is also provided withan air pipe 7 communicating with the discharge pipe 6 through suitablepassages and valves to be hereinafter described, thus permitting bothair and liquid to be injected into the intake manifold.

The receptacle 5 consists of a thin metallic shell 8 which is mountedupon and secured to a base 10 having an extended tubular portion 11received within a supporting ring 12 as shown clearly in Fig. 2. Fittingwithin the tubular portion 11 of the base is a tube 14:, formed of brassOr similar material which is not affected by the gasolene. Theupper endof this tube extends above the base 10 and is provided with one or moreopenings 15 to permit the flow of gasolene from the receptacle 5 throughthe tube into the discharge pipe. The flow of gasolene from thereceptacle into the discharge pipe iscontrolled by a plunger'16 slidingwithin the tubel i and actuated by a rod 17 extending completely throughthe receptacle, and guided at the top in a bearing 18 secured in the topportion of the shell 8. In order to prevent the escape of fumes from thegasolene, or other liquid fuel contained within the receptacle, thebearing for the plunger rod is packed with flexible material indicatedat 19. This flexible packing is kept tight by ,a disk 22 pressed againstit through a spring to be hereinafter described. In order to prevent theescape of liquid into the discharge pipe when the plunger'isin adepressed position the tube 14 is provided with a conical bottom 20having an opening 21 formed in the apex which is adapted to be closed bya needle valve 23 depending from the lower end of the plunger 16, asshown clearly in Fig. 2. The needle valve 23 is connected to the plungerthrough a fulcrum pin 24 permitting the needle valve to be centered withrelation to the opening when the plunger descends. Owing to theformation of the bottom of the tube 14 and the hinged connectionbetweenthe needle valve and plunger, the end of the needle valve iscaused to engage with and close the opening when the plunger descends.The plunger is raised to elevate the lower end above the opening by aknob 26 secured to the upper end of the plunger rod and is returned toinitial position to close the opening 21 by a spring 27 surrounding theplunger rod and interposed between the plunger and thedisk 22. In orderto prevent the complete withdrawal of the plunger from the tube 14, thespring 27 is so designed that when the lower end of the plunger reachesa position above the opening 15 the coils of the spring will contactwlth one another, preventing further upward movement of the plunger. Thefilling of the receptacle 5 is conveniently accomplished through anopening closed by a removable cap 28 normally held in place by a spring29. The cap 28 is conveniently retained in position to leave the openingexposed by a hook 34 arranged to engage" over 1 the edge of the shelfwhen the cap is'withdrawn from the opening.

It is very desirable that a single unitary apparatus be provided forboth the injection of liquid and air into the intake manifold. To thisend the present construction includes an air valve with cooperatingdevices for controlling the flow of air into the manifold. The air pipe7 is threaded at its inner end in the ring 12, which is Provided with anair passage 30 adapted to communicate with the discharge pipe 6 throughan air opening 31 leading into the discharge pipe below the bottom ofthe tube 14. The flow of air through this opening is controlled by arotatable sleeve 32 having an opening 33 formed therein which is adaptedto register to a greater or less extent with the opening 31. The sleeve32 is actuated bya laterally extending handle 35, the movements of whichare limited by a pin 37 secured in the rmg 12 and projecting into anarcuate slot 38 formed in the upper face of the sleeve, as

1 shown clearly in Fig. 4 of the drawings.

I The sleeve is journaled upon the tubular ex-' tension 11 of the baseand is retained'in place by a locking nut 40. This construction permitsthe injection of air into the manifold both in combination with theliquid fuel and independently of the liquid when it is desired to securea lean mixture.

The apparatus is conveniently adapted for attachment to the dash of anautomobile and to this end a bracket 41 is clamped to the base'ringthrough the air pipe 7 In the illustrated. embodiment of the inventionthe bracket 41 is provided with an annular shoulder 43 which is engagedby 'a clamp disk 44held in place against the shoulder by a lock nut 45threaded upon'the' pipe 7 The bracket 41 is provided withoppositelyextending feet 46 which are adapted for the reception offastening 'members to enable ported upon the dash. In the illustratedembodiment of the invention the air pipe is made of sufficient length toextend completely through the dash drawing air from beneath the hood,and the outer end of the air pipe is threaded for the reception of a nutto cause the air pipe to act as an additional securing means.

It will be Observed that with the priming device located in this mannerupon the dash, it is conveniently accessible to the operator both forthe priming of the motor preparatory to starting and for regulating theamount of air injected into the motor during the operation. Thelaterally extending handle 35 may be conveniently turned by the foot orhand of the operator, regulating the injection of air into the manifoldas desired. Furthermore, the provision of the small orifice 21, inconnection with the'air opening, causes the gasolene or other liquidwhich is injected into the manifold to be thoroughly broken up andatomized.

While it is preferred to employ the specific construction andarrangementof parts shown and described, it will be understood that thisconstruction and arrangement is not essential except so far as specifiedin'the claims and may be changed or modified without departing from thebroader features of the invention. I

The invention having been described, what is claimed is: 1 i

1. A priming device, having in combination, a liquid receptacle, adischarge pipe leading therefrom and adapted to be connected with theintake manifold of a motor, a tube projecting into the lower portion ofthe interior of the receptacle and having openings at the top portionleading into the liquid receptacle at a predetermined height above thebottom and a restricted opening at the bottom leading to the dischargepipe,

a plunger sliding within the tube, a valve carried by the plunger andadapted to close the opening when the plunger is located at thebottom'of the tube, and a spring for normally maintaining the plunger atthe bottoni of the tube to permit liquid to flow from the receptacleinto the tube when the plunger is elevated and to be thereafter ejectedby the plunger when the latter is released and returned by the spring tocause a substantially measured amount of liquid to be delivered to thedischarge pipe.

2. A priming device, having in combination, a liquid receptacle having atubular extension projecting downwardly therefrom,

and having a restricted opening the bot connected with the ring, an airlntake pipe secured to the ring and communicating with the air passageformed therein, a sleeve valve journaled in the extension andcontrollingthe passage of air from the intake pipe to the discharge pipe, and aplunger received in the tubular extension and adapted to forcibly ejectliquid through the opening when the plunger descends into the tubularextension.

3. A priming device comprising a liquid receptacle, a tubular extensionextending from the bottom of the receptacle, a tube of noncorrodiblematerial fitting within the extension, a plunger slidingly supportedwithin the tube, a stem secured to the plunger and extending completelythrough the receptacle, a bearing for the stem mounted upon the top ofthe receptacle and having a flexible packing supported therein, a diskengaging with the packing, and a spring surrounding the stem andinterposed between the plunger and disk for normally retaining theplunger in depressed position and for pressing the disk against thepacking.

41-. A priming device comprising a liquid receptacle, a supporting ringfor the receptacle, a discharge pipe, connections between the receptacleand discharge pipe, an air intake pipe secured to the ring, a' bracketfor attaching the device to a motor vehicle, and means mounted upon theintake pipe for securing the bracket to the supporting ring.

LOUIS A. CASGRAIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

